U.S. patent number 5,916,282 [Application Number 08/930,671] was granted by the patent office on 1999-06-29 for switch cabinet door lock.
This patent grant is currently assigned to Rittal-Werk Rudolf Loh GmbH & Co. KG. Invention is credited to Oskar Elm, Udo Munch, Thomas Weber.
United States Patent |
5,916,282 |
Elm , et al. |
June 29, 1999 |
Switch cabinet door lock
Abstract
The invention relates to a catch for a door, especially a
switchboard door, with a lock plate which can be secured to the
door and bears a door lock and a bolt cover guided adjustably on
the lock plate which can be secured in a position covering the door
lock by means of a cover lock. Complete sealing with substantially
increased security against unauthorized access to the door lock is
attained in that the door lock takes the form of a casement lock
and the cover lock that of a cylinder lock, a partial cover is
secured to the lock plate which overlaps with the bolt cover in the
locked position at the contact point and forms a sealed lock cover,
and a cover for the cylinder lock is rotatably fitted on the bolt
cover.
Inventors: |
Elm; Oskar (Dietzholztal,
DE), Munch; Udo (Sinn, DE), Weber;
Thomas (Herborn, DE) |
Assignee: |
Rittal-Werk Rudolf Loh GmbH &
Co. KG (Herborn, DE)
|
Family
ID: |
7758552 |
Appl.
No.: |
08/930,671 |
Filed: |
September 30, 1997 |
PCT
Filed: |
March 27, 1996 |
PCT No.: |
PCT/EP96/01342 |
371
Date: |
September 30, 1997 |
102(e)
Date: |
September 30, 1997 |
PCT
Pub. No.: |
WO96/31674 |
PCT
Pub. Date: |
October 10, 1996 |
Foreign Application Priority Data
|
|
|
|
|
Apr 1, 1995 [DE] |
|
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195 12 280 |
|
Current U.S.
Class: |
70/423; 70/427;
70/DIG.63; 70/455 |
Current CPC
Class: |
E05B
17/142 (20130101); H02B 1/38 (20130101); Y10T
70/7955 (20150401); Y10T 70/7977 (20150401); Y10T
70/8649 (20150401); Y10S 70/63 (20130101) |
Current International
Class: |
E05B
17/00 (20060101); E05B 17/14 (20060101); H02B
1/38 (20060101); H02B 1/00 (20060101); E05B
013/02 () |
Field of
Search: |
;70/DIG.63,423,427,428,455,DIG.30,78,424,425,426 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Meyers; Steven
Assistant Examiner: Vaterlaus; Clifford B.
Attorney, Agent or Firm: Jansson, Shupe, Bridge &
Munger, Ltd.
Claims
What is claimed:
1. A locking mechanism comprising:
door;
a lock plate connected to the door and having a hole, the lock
plate having a turnbuckle door lock thereon;
a first cover portion adjustably mounted on the lock plate and
movable thereon between a closed position covering the door lock
and an open position exposing the door lock;
a cylinder cover lock for locking the first cover portion in the
closed position;
a second cover portion affixed with respect to the lock plate and
overlapping the first cover portion in its closed position; and
a lock shield supported on the first cover portion;
and wherein:
the turnbuckle door lock is lodged in a lock cabinet having an
upper and a lower side;
the lock cabinet is inserted in the hole of the lock plate; and
the cover lock has a locking element that locks at the upper side
of the lock cabinet when the first cover portion is in the closed
position.
2. The locking mechanism of claim 1 wherein the lock shield is
mounted for rotation in a plane perpendicular to the switch cabinet
door.
3. The locking mechanism of claim 1 wherein the second cover
portion is integrally molded to the lock plate.
4. The locking mechanism of claim 1 wherein the cylinder of the
cover lock is restrained by a wall so as not to rotate in the first
cover portion.
5. The locking mechanism of claim 1 wherein:
a first cross piece is molded to the first cover portion;
a second cross piece is molded to the second cover portion; and
the first cross piece and second cross piece fit together when the
first cover portion is in the closed position.
6. The locking mechanism of claim 1 wherein:
the lock plate contains at least one lateral groove; and
the first cover portion has at least one guide piece that engages
the lateral groove.
7. The locking mechanism of claim 6 wherein:
a stop pin is inserted in the lateral groove on the lock plate;
the guide piece contains a recessed indentation; and
the stop pin and indentation fix the first cover portion on the
lock plate while allowing movement between the open and closed
positions.
8. The locking mechanism of claim 1 wherein:
the first cover portion has at least one lateral wall having an
opening;
the lock shield is attached over the opening;
a lock cylinder of the cylinder cover lock has a long axis;
the lock cylinder is positioned in the first cover portion such
that its long axis is substantially parallel to the door and
substantially horizontal; and
the lock cylinder is accessible through the opening in the lateral
wall of the first cover portion.
9. The locking mechanism of claim 1 wherein
a fastening screw attaches the lock plate to the door;
the fastening screw extends into the first cover portion;
the first cover portion includes a stop; and
the fastening screw and the stop secure the first cover portion in
the opened position.
Description
FIELD OF THE INVENTION
This invention is related generally to door locks and, more
particularly, to door locks for a switch door cabinet.
BACKGROUND OF THE INVENTION
This type of lock is known from DE 86 05 436 U1. This known lock
serves to make access to the door lock depend on authorization and
to protect it from the influence of weather. This is not
accomplished optimally by using the illustrated design, since the
cover lock is always exposed and there is not sufficient security
with regard to unauthorized access.
OBJECTS OF THE INVENTION
It is an object of this invention to provide a lock for a switch
door cabinet overcoming some of the problems and shortcomings of
devices of the prior art.
Another object of this invention is to provide a lock for a switch
door cabinet that increases security fundamentally with regard to
unauthorized access.
Still another object of the invention is to provide a lock for a
switch door cabinet that is adequately protected from the
influences of the weather. How these and other important objects
are accomplished will be apparent from the following descriptions
and from the drawings.
SUMMARY OF THE INVENTION
The invention involves a locking mechanism for a switch cabinet
door comprised of: (1) a door; (2) a lock plate, connected to the
door, said lock plate having both a door lock upon it and a hole;
(3) a first cover portion adjustably mounted on the lock plate and
moveable thereon between a closed position covering the door lock
and an open position exposing the door lock; (4) a cover lock for
locking the first cover portion in the closed position; (5) a
second cover portion affixed with respect to the lock plate and
overlapping the first cover portion in its closed position; and (6)
a lock shield supported on the first cover portion.
In a particular embodiment of the invention, the door lock is
constructed as a turnbuckle lock and the cover lock is constructed
as a lock cylinder. In a specific version of this embodiment, the
lock shield is capable of rotating. In a more specific version of
the embodiment, the turnbuckle lock is lodged in a lock cabinet
that has an upper and lower side. The lock cabinet is inserted in
the hole of the lock plate and the cover lock has a locking element
that locks at the upper side of the lock cabinet when the first
cover portion is in the closed position.
In another embodiment of the invention, the second cover portion is
integrally molded to the lock plate.
In a preferred embodiment of the invention, the lock cylinder is
restrained by a wall so as not to rotate in the first cover
portion. In still another preferred embodiment, a first cross piece
is molded on to the second cover portion, a second cross piece is
molded on to the first cover portion and the first cross piece and
second cross piece fit together when the first cover portion is in
the closed position.
In a more preferred embodiment of the invention, the lock plate
contains at least one lateral groove and the first cover portion
has at least one guide piece that engages the lateral groove. In a
specific version of this embodiment, a stop pin is inserted in a
lateral groove on the lock plate, the guide piece contains a
recessed indentation and the stop pin and indentation fix the first
cover portion on the lock plate while allowing movement between the
closed and open position.
In still another preferred embodiment of the invention, the first
cover portion has an opening in one of its lateral walls and a
cover is attached over the opening. The lock cylinder is positioned
in the first cover portion such that its long axis is parallel to
the door (and horizontal) and the lock cylinder is accessible
through the opening in the lateral wall of the first cover
portion.
In yet another preferred embodiment of the invention, a fastening
screw attaches the lock plate to the door, a fastening screw
extends into the first cover portion, the first cover portion
includes a stop and the fastening screw and the stop secure the
first cover portion in the open position. In a specific version of
this embodiment, the fastening screw attaches the second cover
portion to the door.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a top view of a lock with the slide cover in the open
position.
FIG. 2 is a longitudinal section through the lock according to FIG.
1 whereby the section plane extends perpendicular to the lock
plate.
FIG. 3 is a top view of the lock with the slide cover in the lock
position.
FIG. 4 is a longitudinal section corresponding to FIG. 2, through
the lock in the position according to FIG. 3.
BRIEF DESCRIPTIONS OF THE PREFERRED EMBODIMENTS
The lock shown in FIGS. 1 to 4 is fundamentally more suitable for
granting authorized access by using a lock cylinder as a security
lock, since a corresponding security key is required. The use of
semi profile cylinders according to DIN 18254 is possible.
As can be derived in particular from FIG. 1 and FIG. 2, a lock
plate 1 is connected to the door 5 by means of two screw joints 4.
This lock plate 1, as a lower part of the lock, bears a part cover
1.1 which is advantageously molded onto lock plate 1. In a hole 12
(FIG. 4) of lock plate 1 there is a lock cabinet 2 that receives
the turn-buckle lock 3 and that projects from the side facing away
from the door 5.
Grooves 6 are formed on both vertical sides of the lock plate 1,
into which a slide cover 7 with guide pieces 10 engages. As can be
seen in FIG. 1, a stop pin 8 is inserted in the groove 6 on one
side of the lock plate 1. This stop pin 8 is guided in a recess 9
of the guide piece 10, permitting an adjustment of the slide cover
7 from the open position into the lock position. The stop pin 8
fixes the slide cover 7 to the lock plate so that it does not get
lost. This groove-spring connection between the slide cover 7 and
the lock plate 1 forms a type of labyrinth seal and prevents the
penetration of dust and water. A lock cylinder 11 is inserted in
the slide cover 7 aligned along axis 23 parallel to the door and
horizontal, so that the structural height of the lock can be kept
low. A wall 7.1 of the slide cover 7 thereby fixes the lock
cylinder 11 so that it cannot rotate. The front faces of part cover
1.1 and slide cover 7 form a contact point which, as the molded
cross pieces 1.2 and 7.2 show, also form a seal when the slide
cover 7 is brought into its lock position. A closed cover of the
lock is thereby achieved. The access to the lock cylinder 11 is
thereby covered and protected by a covering 13 supported so as to
rotate on the slide cover 7 and in a plane 25 perpendicular to the
door 5.
The turnbuckle type door lock 3 extends along first axis 21 (which
is perpendicular to the door 5) and can be activated by means of a
key 15 when the slide cover 7 is opened.
If, as FIGS. 3 and 4 show, the slide cover 7 is brought to its lock
position, then the lock element 11.1 of the lock cylinder 11 can be
rotated into the position as shown in FIG. 4 and engages behind the
lock cabinet 2 such that the slide cover 7 can no longer be
adjusted downward. Part cover 1.1 and slide cover 7 overlap in the
area of the cross pieces 1.2 and 7.2 and seal off the contact
point. The lock can only be opened by an authorized person who has
a security key 14. Only if the lock element 11.1 of the lock
cylinder 11 is again turned back can the slide cover 7 be moved
into the open position. Access to the turnbuckle lock 3 is then
available.
Fixing the slide cover so that it cannot get lost can also be
achieved such that a screw on the inside of the door, in particular
fastening screw 4, is used to fasten the lock plate 1 and/or the
part cover 1.1. The fastening screw 4 then projects into the
slide-cover 7 and acts together with a stop 18 secured inside the
first cover member such that the slide-cover 7 is fixed to the lock
so that it cannot get lost.
While the principles of this invention have been described in
connection with specific embodiments, it should be understood
clearly that these descriptions are made only by way of example and
are not intended to limit the scope of the invention.
* * * * *